* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  text-align: center;
  max-width: 500px;
  padding: 2rem;
  background: white;
  border-radius: 15px;
}

h1 {
  color: #2c3e50;
  margin-bottom: 1.5rem;
  font-weight: 600;
}

button {
  padding: 12px 30px;
  font-size: 16px;
  color: white;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  margin-bottom: 2rem;
  transition: all 0.3s ease;
  font-weight: 500;
  letter-spacing: 0.5px;
}

button:hover {
  transform: translateY(-2px);
}

button:active {
  transform: translateY(0);
}

.box {
  width: 100%;
  padding: 2rem;
  color: white;
  display: none;
  opacity: 0;
  transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1), transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 10px;
  text-align: center;
  transform: translateY(20px);
  margin-bottom: 1.5rem;
  background-color: red;
}

.box.show {
  display: block;
}

.box.visible {
  opacity: 1;
  transform: translateY(0);
}

.box h2 {
  margin-bottom: 1rem;
  font-weight: 500;
}

.box p {
  line-height: 1.6;
}

.explanation {
  background: #f8f9fa;
  padding: 1.2rem;
  border-radius: 8px;
  font-size: 14px;
  color: #555;
  line-height: 1.6;
}

.explanation h3 {
  color: #2c3e50;
  margin-bottom: 0.5rem;
  font-size: 16px;
}
